Safety cut-off device for valves



Jul; 21, 1925. i 1,546,637

w. ERNST 1 SAFETY CUT-OFF DEVICE FOR VALVES Filed Feb. 16, 1925 E n V 2730 valve-closing means Patented July 21, 1 925.

UNITED STATES,

WILLIAM ERNST, OF KANSAS CITY, KANSAS.

SAFETY CUT-OFF DEVICE VA LVES.

Application filed February is, 1925. Serial No. 9,517.

T 0 all whom it may concern:

Be it known that I, WILLIAM ERNST, a citizen of the of Kansas City,county of VVyandotte, State of Kansas, have invented a certain new anduseful Improvement in Safety Cut-Off Devices for Valves, of which thefollowing is a complete specification.

The present invention relates to automatic cut-off or safety devices forvalves, with particular reference to valves for controlling the fuelsupply to burners, such as gas burners, and the special object in viewis to provide a protective cut-off device particularly adapted for usein connection with coffee urns or the like, and operative to cut off thefuel supply to prevent damage to the urns structure in the event of thewater chamber running dry. j V

Accordingly, I have provided an improved cut-oif device arranged inconnection with a burner valve, and having automatic, adapted to permita certain amount of independent movement of the valve for regulating theflow of fuel, while also operating automatically when released, ashereinafter described, for completely closing the valve and shutting offthe fuel supply. 1

In the specific form of the invention herein illustrated, I employ avalve having an arm attached to one of its ends, and adapted to beengaged by a second arm for the purpose of automatically closing thevalve upon the release of said second arm, as by the melting of a fuseattached to the urn in the event of the latter being subjected to anunsafe temperature. It is also preferred to mount the principal elementsof the device w'vithin a suitable casing or housing attached to thevalve casting and arranged to accommodate the necessary releasableconnection extending to a fixed point outside the housing, as to the urnitself.

lVith the foregoing general objects in view, the invention will now bedescribed with reference to the accompanying draw ing illustrating oneform of construction which I have devised for practically embodying theimprovement, after which those features deemed to be novel will beparticularly set forth and claimed.

In the drawing- Figure 1 is a front elevation, illustrating a burner andits valve having associated therewith a cut-off device embodying theUnited States, and a resident present invention, the parts being alsoillus trated in proper relation to the bottom of an urn, indicated insection;

Figure 2 is a sectional detailed view of the valve and adjacent par-ts,representing asection taken on the line Ill-11 of Figure 1;

Figure 3 is a detail section, taken on the line III-III of Figure 2; and

Figure 4 is a similar sectional detailed View, with the parts occupyinga different operative position.

Referring now to the drawing in detail, this illustrates the improvedcut-off device in operative relation to an ordinary gas burner -6arranged beneath the bottom 7 of an urn (see Figure 1), the supply offuel to the burner being controlled by an ordinary valve 8 mounted inthe usual valve fitting or casting 9 connecting the stem 10 of theburner 6 with the fuel pipe 11;

The valve 8 has the usual handle or operating portion 12, and in thepresent construction I provide the opposite end of the valve with asuitable arm 14 which is fixed for rotative movement with the valve, asby means of a D-shaped opening 15, as illustrated in Figures 3 and 1,the arni being retained in this position by means of a screw 16. 1

To this side ofthe valve casting 9 I also attach a suitable casing orhousing member 17 fitted with screws 18 having their threaded endsscrewed into said casting9 (see Figure 2). Mounted centrally within thiscasing or housing 17 is a pin or screw 19 serving for pivotally mountinga second springactuated arm 20, the pin or screw 19 being mounted inalinemcnt with the axis of the valve 8, for adapting said arm 20 formovement coaxially with sald valve. This arm 20 is also formed withprojections 21 extending laterally in the direction of the arm 14, andadapted to engage the ends of the latter as illustrated in Figure lwhich represents the valve-closing action of the arm 20.

Coiled about the pin or screw 19 between the arm 20 and the casing is aspring 22 one end of which is hooked over the arm 20, while the oppositeend of said spring is engaged by one of the screws 18, the function ofthis spring being to effect the automatic closing movement of the arm20. The arm 20, however, is normally retained in inoperative ositionillustrated in Fi ure 3 b the Y means of a releasable connectioncomprising It will thus be apparent that I have devised ractieai andeliicient construction for fulfilling the desired objects of theinvention. The normal or inoperative arrangement of the parts is clearlyillustrated in Figures 1 to 3, in which the arm 20 is maintained in aposition in which its lugs or projections 21 are out of engagement withthe ends of the valve arm 14, so that it is apparent that the valve maybe freely manipulated as required for the usual regulation 01": the flowof fuel to the burner 6. However, in the event of the link connections24; and 26 being released, as by melting of the solder material 30, thespring 22 is then free to act for the purpose of rotating the arm 20 inthe proper direction for the engagement of its lugs 'Or projections '21with the ends of the arm 14, thereby rotating the valve 8 into closedposition, as is clearly illustrated in Figure 4. Thus the supply offuelto the burner '6 is promptly cut off, and the urn structureprotected against any damage which would be produced it the operation ofthe burner were continued.

The improved construction is of very simple and c01npacttorm, and, beingenclosed in a neat form of housing, presents an appearance which doesnot detract in any way from the valves appearance, while further theconstruction shown is comparatively cheap to manufacture and comprisesnothing that is readily gotten ont'of order. While I have illustratedwhat 1 regard as the preferred -liorm ot construction for embodying theproposed improvement, desire to reserve the right to make such changesand modifications as may fairly fall within the scope of the appendedclaims.

lVhat I claim is:

1. A safety cut-oil valve construction comprising, in combination with avalve, an arm attached to the valve, and an automatic valve-closingdevice provided with means for engaging said arm to close the valve andpermitting limited movement of the arm whereby the valve may beregulated independently of the valve-closing movement of said device.

2. A safety cut-oft valve construction comprising, in combination with avalve, an arm attached to the valve, a second spring-actuated armmounted for independent movement coaxial with said valve and havingmeans for engaging said first arm to close the valve, and releasablemeans for retaining said spring-actuated arm in inoperative position.

3. A safety cut-oil valve construction comprising, in combination with avalve casting and valve, an arm attached to the valve, a secondspring-actuated arm mounted for independent movement coaxially with saidvalve and having means for engaging said first arm to close the valve, acasing attached to said valve casting and enclosing said arms, and areleasable connection to said second arm and extending to a fixed pointoutside the casing for retaining said second arm in inoperativeposition.

4. A' safety cut-oil valve construction comprising, in combination witha valve casting and valve, an arm attached to the valve, a casingattached to said valve casting and enclosing said arm, a secondspring-actuated ar mounted within said casing for inde pendent movement'coaxially with said valve and having means for engaging said first aimto close the valve, and areleasable connection to said second arm andextending through the casing to a fixed point outside the latter formaintaining said second arm inoperative.

In witness whereof I hereunto ailix my signature.

WILLIAM ERNST.

